:root {
  font-family: Inter, system-ui, Avenir, Helvetica, Arial, sans-serif;
  line-height: 1.5;
  font-weight: 400;

  color-scheme: light dark;
  color: #213547;
  /* background-color:rgb(240, 240, 240); */

  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  display: flex;
  place-items: center;
  min-width: 320px;
  min-height: 100vh;
}

#app {
  max-width: 1280px;
  margin: 0 auto;
  padding: 2rem;
  text-align: center;
}

#btn {
  width: 100px;
  height:45px;
  background: rgb(240, 240, 240);
  border-radius: 15px;
  text-shadow: 0px 0px 1px rgb(81, 81, 81);
  color: transparent;
  user-select:none;
  cursor: pointer;
  
  display: flex;
  align-items: center;
  justify-content: center;

  box-shadow: inset 8px 8px 10px rgb(250, 250, 250), inset -6px -6px 10px rgb(131, 131, 131), 15px 15px 15px rgb(151, 151, 151);
  transition: 0.1s
}

#btn:hover{
  background: rgb(233, 233, 233);
}

.shadow{
  box-shadow: 6px 6px 8px rgba(155, 155, 155, 1),
    -6px -6px 10px rgba(255, 255, 255, 1);
}